Question

Find the area of the circle pictured. Use A = 3.14r ^2

A. A = 12.56n^2 - 37.68n + 28.26
B. A = 12.56n^2 + 28.26
C. A = 6.28n^2 - 9.24

Answer 1

http://roads.advancedacademics.com/contentserver/content/roadssection/277545/questions/7exam/7exam_q24.gif

Answer 2

what was r?

plug it into the formula. I know you can do this :)

Answer 3

r is 2n-3

Answer 4

ok plug it in

Answer 5

okay so the formula would be A= 3.14(2n-3)^2?

Answer 6

okay when I did the formula I got a answer tht's not in the choices.

Answer 7

yes that is correct. you must factor out now

3.14 [(2n-3)(2n-3)]

Answer 8

So will the answer be A?

Answer 9

yes

Answer 10

Yes!! thnk u so much for ur help. n dnow i understand how to figure out problems like theese.